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UL634H256SK45G1 Datasheet(PDF) 9 Page - Simtek Corporation

Part # UL634H256SK45G1
Description  Low Voltage PowerStore 32K x 8 nvSRAM
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Manufacturer  SIMTEK [Simtek Corporation]
Direct Link  http://www.simtek.com
Logo SIMTEK - Simtek Corporation

UL634H256SK45G1 Datasheet(HTML) 9 Page - Simtek Corporation

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UL634H256
9
August 15, 2006
STK Control #ML0058
Rev 1.1
u: If the chip enable pulse width is less then ta(E) (see READ cycle) but greater than or equal to tw(E)SR, then the data may not be valid at
the end of the low pulse, however the STORE or RECALL will still be initiated.
v: W must be HIGH when E is LOW during the address sequence in order to initiate a nonvolatile cycle. G may be either HIGH or LOW
throughout. Addresses 1 through 6 are found in the mode selection table. Address 6 determines whether the UL634H256 performs a
STORE or RECALL.
w: E must be used to clock in the address sequence for the software controlled STORE and RECALL cycles
tcR
tw(E)SR
ADDRESS 1
VALID
Software Controlled STORE/RECALL Cyclet, u, v, w (E = HIGH after STORE initiation)
ADDRESS 6
(29)
(29)
th(A)SR
(35)
(34)
tsu(A)SR (33)
tcR
tw(E)SR
ADDRESS 1
VALID
VALID
ADDRESS 6
td(E)S (31)
(32)
(29)
th(A)SR
(35)
(34)
tsu(A)SR (33)
tdis(E)SR (30)
th(A)SR
(35)
tsu(A)SR
(33)
tw(E)SR
th(A)SR (35)
(34)
tsu(A)SR
(33)
(5)
tdis(E)
Software Controlled STORE/RECALL Cyclet, u, v, w (E = LOW after STORE initiation)
tdis(E)SR (30)
VALID
High Impedance
High Impedance
Ai
E
DQi
Output
Ai
E
DQi
Output
td(E)S (31)
(32)
td(E)R
td(E)R
tcR


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